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For capturing audio, the QLXD2/SM86 Handheld Wireless Transmitter by Shure is a good choice to get the job done. Featuring transparent 24-bit digital audio quality, it is used for wireless vocals in presentation spaces, music venues, houses of worship, DJ setups, and more. It features a 20Hz to 20kHz frequency response and has more than 60 available channels per frequency band. Powered by 2 AA batteries, the QLXD2 quickly syncs with a wireless receiver over IR at the push of a button and maintains clear, uninterrupted signal over its entire 100 m (328 ft.) range. All-metal construction ensures durability, and a wide selection of compatible microphone choices is ideal for your presentation.
For the Shure QLX-D wireless system
Features interchangeable Shure microphone capsules
AES 256-bit encryption for secure transmission
Up to 9 hours continuous use with 2 x AA alkaline batteries
Optional Shure SB900 lithium ion rechargeable battery (sold separately) provides up to 10 hours of continuous use and reports remaining runtime in hours and minutes
Backlit LCD with easy to navigate menu and controls
Selectable display mode showing group/channel, frequency, or battery runtime
Rugged metal construction
Transmitter has 328' (100 meter) line-of-sight operating range
Features frequency and power lockout
In the Box
Shure QLXD2/SM86 Handheld Wireless Transmitter (H50: 534 to 598 MHz)
Battery Contact Cover
Limited 2-Year Warranty
Table of Contents
RF Carrier Frequency Range
H50: 534 to 598 MHz
328' (100 m)
Tuning Step Size: 25 kHz, varies by region
Better than 70 dB, typical
−97 dBm at 10−5 BER
Less than 2.9 ms
20 Hz to 20 kHz
Audio Dynamic Range
System Gain @ +10: Better than 120 dB, A-weighted, typical
Total Harmonic Distortion (THD)
−12 dBFS input, System Gain @ +10: Less than 0.1%
System Audio: Positive pressure on microphone diaphragm produces positive voltage on pin 2 (with respect to pin 3 of XLR output) and the tip of the 6.35 mm (1/4-inch) output.
Operating Temperature Range
0° to 122°F (-18° to 50°C) Note: Battery characteristics may limit this range.
Storage Temperature Range
-20° to 165°F (-29° to 74°C) Note: Battery characteristics may limit this range.
Mic Offset Range
0 to 21 dB (in 3 dB steps)
Shure SB900 rechargeable Li-Ion or AA batteries 1.5 V
At 10 mW Shure SB900: up to 10 hours Alkaline: up to 9 hours
Configuration: unbalanced Maximum Input Level 1 kHz at 1% THD: 145 dB SPL (SM58), typical Note: Dependent on microphone type
Maximum Input Level
1 kHz at 1% THD: 145 dB SPL (SM58), typical Note: Dependent on microphone type
Antenna Type: Integrated single band helical Occupied Bandwidth: Less than 200 kHz Modulation Type: Shure proprietary digital Power: 1 mW or 10 mW (varies by region)